Senior Member

Senior Member

The bokeh is so smooth... As if like Gausian Blur!
I went up to your Flickr and had a look at the photos. Your EXIF states f/6.3 but the bokeh itself doesn't really suggest it... It looked like from a bigger aperture...

Senior Member

The bokeh is so smooth... As if like Gausian Blur!
I went up to your Flickr and had a look at the photos. Your EXIF states f/6.3 but the bokeh itself doesn't really suggest it... It looked like from a bigger aperture...

Hi Chow
Because this is an STF lens, This lens has been specifically designed to produce extraordinarily smooth, natural bokeh without vignetting. But also because of the STF lens causes the light to be weakened, so you see the f6.3 is the amount of light pass through the lens, but the aperture value is actually about f3.2.